Diffractive ϕ Production in a Perturbative QCD Model
J. Alam, A. Hayashigaki, K. Suzuki, T. Hatsuda
Abstract
The elastic leptoproduction of ϕ measured by the H1 collaboration at HERA is described by a perturbative QCD model, based on open ss production and parton hadron duality, proposed by Martin et al. We observe that both the total cross section and the ratio of the longitudinal and transverse cross sections are well reproduced with an effective strange-quark mass ms 320- 380 MeV for various gluon distribution functions. Possible connection of the effective mass and the momentum dependent dynamical mass associated with dynamical breaking of chiral symmetry is also discussed.
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